The utility model provides a nearly drill bit rotary vibration drilling tool, include: well urceolus, be equipped with the splined mandrel in the well urceolus, extend along the circumferencial direction at the splined mandrel middle part has first boss, the cover has footstep bearing no. One on the splined mandrel, a footstep bearing rigid coupling is on the up end of first boss, the cover has first cam on the splined mandrel, and the lower surface of first cam and a footstep bearing's last surface contact, and the well urceolus inner wall that is close to first boss department extends along the circumferencial direction has the second boss, there is the space between second boss and the first boss, first cam is connected with the spline fit of second boss. The drilling tool improved the mechanical drilling speed of hard ground layer well drilling, alleviated nearly drill bit backing pressure and drill bit stick -slip phenomenon, solved the problem of well drillings speed -raisings such as dark directional well, big displacement well, horizontal well, creep into the effectual speed -raising means that provide for directional inclined shaft.